"You know all of the fuss that’s been going on about the three comic skits that are on the fourth disc of the international release? Big news: they’re on the 3rd disc of the U.S. release as well! They’re hidden on the disc as Easter eggs. The SNL skit can be found in the Deleted Scenes menu – look for the couple in the “Extended Carpathia Sequence” toward the bottom of the screen. The “Titanic in 30 Seconds with Bunnies” clip can be found in the Still Galleries menu – you’ll have to go through the menu, but keep an eye on the arrow in the middle of the screen. And the MTV Movie Awards clip is in the Marketing menu – keep an eye peeled toward the vest at the bottom right of the screen. Another indicator that these features are on the disc is in the DVD credits section on Disc 3.
With this big find, that leaves just the trailer gallery and the HBO First Look special."
A big, big thank you for this info. Looks like we've narrowed the search down a bit!